I've smoked for almost 20 years. I was able to quit thank God.
I tried many times to quit, failed a lot of times.
I was able to quit with prayer and vaping

)
So yeah, I still have an addiction with vaping that I would like to stop with.
I also smoked weed for over 10 years almost every day.
It was not as hard to quit as the cigarettes, or should I say.it was hard, but different.
It was mostly making the step to finally stop. The withdrawals are just sweating and lack of sleep for a week or so.
It's all psychological with weed. I used it sort of like medication when I began for depression. It helped in the beginning, and then just made it worse over time.
But I felt like I couldn't quit. I felt like my life would feel meaningless without it. This was before I began taking my faith more seriously. I was lacking a lot of meaning in life in general.
And weed went a long great with another addiction of mine. Like another poster previously said in here. MMORPG's.
I was escaping into fantasy worlds.
I don't play video games all day long anymore.
Hardest addiction as a Christian for me is masturbation. Sorry it got awkward lol.
It's a sin. And used to be a habit I did every day.
Now I last like up to a week before I fail.
It's so hard to resist after a while. Even more so in this modern world where you can't go anywhere without seeing half naked woman.
Reading the news? On the side of the screen there's an ad with half naked woman.
Watching a movie on netflix? Sex scenes in almost all movies
Sex, sex, sex everywhere